Data Collection - Day 4

12/3/10EQ: How do I read circle

graphs?

•Which statements are true?

• Diagonals are shorter than the sides• Diagonals meet at right angles.• Diagonals are not parallel to any

side.

Homework• Check yesterday’s homework• Collect or stickers• New homework • Discuss problems to solve.

Angle Review • A rhombus has 1 interior angle

of 45 degrees. What are the other 3 angles?• 45, 135, 135

Angle Review • You designed an isosceles

triangle flag. One interior angle is 40 degrees. What are the possibilities for the others?• 40, 100• 70, 70

Best Graph for• Comparing ?• Bar/Picto –• Change over time?• Line Graph• Finding median, mode, range?• Stem & Leaf

Circle Graphs• Best graph for• Understanding parts of a whole• Parts of circle graph are called

wedges.

Percents & Decimals• 30% = .30• 75% = .75• 90% = .90• 125% = 1.25

Helpful? How?• 30% of 250 students like ice

cream. How many is that?• 250 x .30 = 75• 75% of 250 students likes tacos.

How many is that• 250 x .75 = 187.5 OR 188

Percents & Fractions• 30% = 30/100 = 3/10• 75% = 75/100 = 3/4• 90% = 90/100 = 9/10• 125% = 125/100 = 1 1/4

Helpful? How?• 30% = ice cream. • 20% = Pie.• 50% = bananas.•What fraction liked bananas?• 50/100 = 1/2

Parts of the Graph1/2 or 50%

1 part2 part

Parts of the Graph1/3 or about 33%

1 part2 part3 part

Parts of the Graph1/4 or 25%

1 part2 part3 part4 part

Parts of the Graph1/5 or 20%

1 part2 part3 part4 part5 part

Parts of the Graph1/6 or about 17%

1 part2 part3 part4 part5 part6 part

Circle Graphs• School has 91 students.

Circle Graphs

Circle Graphs• 93 students surveyed.

Circle Graphs• 75 families surveyed.

EQ:•How do I read circle

graphs?

Practice:•Page 447-448 #5-14